Brightness adjusting system and method and electronic equipment

The invention discloses a brightness adjusting system and method and electronic device.In the system, first electronic equipment is used for displaying a first area and a second area on a first display screen of the first electronic equipment in response to first operation triggered by a user, the first operation is used for indicating to start to adjust the display brightness of a second display screen of the second electronic equipment, the first area and the second area are covered with masks respectively, the display brightness of the second area covered with the mask is equal to the display brightness of the second display screen, or the impression brightness of the second area covered with the mask is equal to the impression brightness of the second display screen; the second electronic equipment is used for determining the first target brightness, adjusting the display brightness of the second display screen according to the first target brightness, and sending the first target brightness to the first electronic equipment; the first electronic equipment is also used for adjusting the transparency of the shade of the second area according to the first target brightness. Therefore, the brightness adjusting efficiency and the adjusting effect of the display screen are improved.